100 milliliters to US fluid ounces
3.38 fl oz
100 mL = 3.38 fl oz.
US fluid ounces
3.38fl oz
100 mL = 3.38 fl oz
In short
How many US fluid ounces is 100 milliliters?
100 mL = 3.38 fl oz. 1 milliliter = 0.033814 US fluid ounces, so the working is 100 × 0.033814 = 3.38.
The working
The factor below is an exact definition rather than a measurement, so nothing is approximated in the arithmetic. The only rounding on this page happens where a number is displayed.
1 milliliter = 0.033814 US fluid ounces 100 × 0.033814 = 3.38
How much precision do you need?
Each row is the same answer cut at a different number of decimals, with what that choice costs you. Pick the shortest row whose error is smaller than whatever you are measuring with.
| Rounded to | Answer (fl oz) | Off by |
|---|---|---|
| Whole number | 3 | −0.38140 |
| 1 decimal | 3.4 | +0.01860 |
| 2 decimals | 3.38 | −0.00140 |
Round trip: take 3.38 fl oz back the other way and you land on 99.9585 mL — a drift of 0.0415 mL. That gap is the rounding, not the conversion.
What 100 mL looks like
100 mL
The TSA 3-1-1 rule allows one container of 3.4 ounces, that is 100 millilitres, per liquid in the cabin.
Frequently asked questions
What is 100 milliliters in US fluid ounces?
100 milliliters is 3.38 US fluid ounces. 1 milliliter = 0.033814 US fluid ounces, so the working is 100 × 0.033814 = 3.38.
How accurate is 3.38 fl oz?
Rounding to 3.38 fl oz and converting straight back gives 99.9585 mL, a drift of 0.0415 mL from the 100 you started with. The factor itself is exact; every bit of that difference comes from the rounding, not the conversion.
Nearby values
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